Nokia is not the only one, in my humble opinion
The Nokia failure has been for years a case study for all business schools. That is the example of how overconfidence can destroy the business itself. The pride of "not invented here" is a devil in the current dynamic world where smart and motivated people can be located in a small village in small unknown Country, having sometimes the power to disrupt the world using a intenet connection. Did really Nokia case teach the business leaders about the risks of overconfidence?